本文選題：異型拱橋 + 靜力分析��； 參考：《西南交通大學》2014年碩士論文

【摘要】：隨著國民經(jīng)濟建設的快速發(fā)展,人們不僅對橋梁建筑的功能提出了更高的要求,也對橋梁建筑的美學提出了更高的要求。由于設計師對橋梁美學的追求,使得橋梁建筑日益的標新立異。拱橋的形式也更為豐富,一些極具個性化的異型拱橋已經(jīng)逐步替代一些傳統(tǒng)拱橋,為世界的橋梁史增添了濃墨重彩的一筆。因此,本文對異型拱橋的受力特性進行分析,進一步了解這種新穎的拱橋。本文通過對跨徑達到150米的外傾式非對稱曲線拱橋——府河橋分析,總結(jié)府河橋的靜力特性、動力特性和穩(wěn)定性。對同類型其他橋梁的設計有一定的參考依據(jù)。首先,本文介紹了拱橋的國內(nèi)外的發(fā)展情況,闡述論文的研究背景和主要研究工作。通過midas civil2012建立全橋有限元模型,進行仿真分析。運用該模型,計算分析鋼拱肋、主梁、吊桿等主要構(gòu)件在恒載、汽車荷載、人群荷載、體系溫度荷載和陣風荷載分別作用和組合作用于橋梁下的內(nèi)力、應力和變形。通過在恒載和活載工況作用下的主梁跨中局部應力簡要討論了箱梁的剪力滯,引申到計算橋梁有效寬度。對橋梁自振特性進行分析,應用反應譜方法分析得到橋梁主要構(gòu)件在縱向、橫向和豎向地震作用下的應力和變形。研究學習穩(wěn)定理論,深入了解大跨度拱橋的平面屈曲以及側(cè)傾失穩(wěn),計算無吊桿裸拱狀態(tài)下橋梁的穩(wěn)定性和成橋狀態(tài)下橋梁的穩(wěn)定性,對比吊桿對橋梁穩(wěn)定性的影響。
[Abstract]:With the rapid development of the national economy, people not only put forward higher requirements to the function of bridge building, but also to the aesthetics of bridge building. Due to the designer's pursuit of bridge aesthetics, bridge architecture is increasingly innovative. The form of arch bridge is also more abundant. Some special arch bridges have gradually replaced some traditional arch bridges, which has added a heavy color to the history of bridges in the world. Therefore, this paper analyzes the mechanical characteristics of the special-shaped arch bridge, and further understand the novel arch bridge. In this paper, the static characteristics, dynamic characteristics and stability of Fuhe Bridge are summarized through the analysis of an extroverted asymmetrical curved arch bridge with a span of 150 meters. It has certain reference basis for the design of other bridges of the same type. First, this paper introduces the development of arch bridge at home and abroad, describes the research background and main research work. The finite element model of the whole bridge is established by midas civil2012, and the simulation is carried out. Using this model, the internal forces, stresses and deformation of steel arch ribs, main beams, suspenders and other main members under dead load, automobile load, crowd load, system temperature load and array wind load are calculated and analyzed respectively. The shear lag of the box girder is briefly discussed through the local stress in the span of the main girder under dead and live load conditions, which extends to the calculation of the effective width of the bridge. The natural vibration characteristics of the bridge are analyzed, and the stress and deformation of the main components of the bridge under longitudinal, transverse and vertical earthquakes are obtained by using the response spectrum method. The stability theory is studied and the plane buckling and roll instability of the long-span arch bridge are deeply understood. The stability of the bridge under the condition of bare arch without suspenders and the stability of the bridge under the condition of bridge completion are calculated. The effects of the suspenders on the stability of the bridge are compared.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U441;U448.22
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本文編號：1944690